<h1>照片库示例</h1>
<body>
<div class="full-img">
    <img class="displayed-img" src="images/pic/1.jpg" 
    style="width: 50%;height: 50%;"/>
    <div class="overlay"></div>
    <button class="dark">变暗</button>
</div>
    <div class="thumb-bar"></div>
    <script src="picture.js"></script>
</body>


